Unloading lap joint device suitable for second-conveying belt reversed loader

Abstract

The utility model relates to the technical field of second-conveying belt reversed loaders, in particular to an unloading lap joint device suitable for a second-conveying belt reversed loader, which is arranged between the second-conveying belt reversed loader and a scraper conveyor and comprises a support frame arranged at the bottom of a frame of the second-conveying belt reversed loader. The bottom of the supporting frame is rotationally provided with two walking wheels, the two walking wheels are located on the two sides of the two-conveying-belt reversed loader respectively, the axial direction of each walking wheel is perpendicular to the conveying direction of the two-conveying-belt reversed loader, each walking wheel is in lap joint with the top of a chute body of the scraper conveyor chute, the end face of the outer side of each walking wheel is connected with a stopping structure, and the stopping structures are arranged on the two sides of the two-conveying-belt reversed loader respectively. The outer edge of the stopping structure protrudes out of the outer circumferential face of the walking wheel, and the stopping structure can prevent the walking wheel from being separated from the top of a chute body of the scraper conveyor chute. Compared with the prior art, the utility model has the advantages of high safety, stronger anti-seismic property, high transportation efficiency and lower installation difficulty.

Description

Technical Field

[0001] This utility model relates to the technical field of secondary conveyor belt transfer machines, specifically to an unloading overlap device suitable for secondary conveyor belt transfer machines. Background Technology

[0002] In underground coal mine tunneling operations, secondary conveyor belt transfer machines and scraper conveyors are commonly used mining machinery. The secondary conveyor belt transfer machine serves as an intermediate transfer device between the tunneling machine and the scraper conveyor. It transfers coal, gangue, and other materials cut by the tunneling machine from the end of the primary conveyor belt to the scraper conveyor via a secondary conveyor belt. The scraper conveyor is the main transport equipment for further long-distance, high-volume transport of materials from the secondary conveyor belt transfer machine. During the widening and sizing of the working face, due to limitations such as roadway space and geological conditions, a single-rail suspended beam method is often used to connect the secondary conveyor belt transfer machine and the scraper conveyor.

[0003] The specific implementation process of this overlapping method is as follows: First, a single-rail lifting beam is constructed on the roof of the roadway and it is firmly installed using anchor bolts, anchor cables and other fixing devices. Then, the tail of the secondary conveyor belt transfer machine is suspended above the scraper conveyor chute using a chain suspension method, so that the material can be directly unloaded into the scraper conveyor, thus completing the transfer connection.

[0004] However, this suspension and connection method has significant technical limitations: First, the stability of the roof directly affects the safety of the system. If the roof rock is soft and the support strength is insufficient (such as the anchoring force of the anchor bolts being lower than the design value or the pre-tightening force of the anchor cables not meeting the standard), the load-bearing capacity of the monorail beam will decrease, increasing the risk of equipment tilting and falling. Second, the vibration resistance of the monorail beam structure is limited. Under the impact of a large flow of coal, the secondary conveyor belt transfer machine is prone to shaking, causing the material unloading trajectory to deviate, resulting in problems such as coal spillage and chute blockage, reducing transportation efficiency. Third, the reliability of the suspension system depends on the installation accuracy and operating procedures. If the chain connection is not firm, the distribution of the lifting points is unreasonable, or daily maintenance is lacking, failures such as the detachment or breakage of the connecting parts may occur, posing a serious threat to the safety of underground workers and equipment. Utility Model Content

[0005] To address the technical problems of existing monorail beam suspension and overlap methods, such as the impact of top plate stability on system safety, the limited vibration resistance of monorail beams leading to reduced transportation efficiency, and the reliance on installation accuracy and operating procedures for the reliability of the suspension system, which can easily cause safety malfunctions, this utility model provides an unloading overlap device suitable for secondary conveyor belt transfer machines.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An unloading overlap device for a secondary conveyor belt transfer machine is provided, which is installed between the secondary conveyor belt transfer machine and the scraper conveyor. The unloading overlap device includes a support frame, which is located at the bottom of the frame of the secondary conveyor belt transfer machine. Two traveling wheels are rotatably mounted at the bottom of the support frame. The two traveling wheels are located on both sides of the secondary conveyor belt transfer machine. The axial direction of each traveling wheel is perpendicular to the transport direction of the secondary conveyor belt transfer machine. Each traveling wheel overlaps with the top of the trough of the scraper conveyor chute. A stop structure is connected to the outer end face of each traveling wheel. The outer edge of the stop structure protrudes from the outer circumference of the traveling wheel. The stop structure can prevent the traveling wheel from detaching from the top of the scraper conveyor chute.

[0008] This application utilizes rolling wheels at the bottom of the support frame to connect with the top of the scraper conveyor chute, allowing the secondary conveyor belt to connect with the scraper conveyor via the rolling of these wheels. The rolling wheels must not detach from the top of the scraper conveyor chute. Compared to existing technologies, this application eliminates reliance on the roof, avoiding the need for anchor bolts or cables to suspend it from the roadway roof. This avoids the reduced load-bearing capacity of the monorail beam caused by soft roof rock or insufficient support strength (such as low anchor bolt anchoring force or inadequate anchor cable preload), fundamentally eliminating the risk of equipment tilting and falling, and improving system safety. This application also boasts strong seismic resistance. The rolling contact of the rolling wheels replaces the rigid suspension in existing technologies, buffering the vibrations caused by large-volume coal flow impacts, reducing the swaying of the secondary conveyor belt, and preventing coal spillage and chute blockage caused by material unloading trajectory deviation, thus improving transportation efficiency. The installation of this application is relatively simple. It is directly attached to the top of the scraper conveyor chute by means of the traveling wheels, which simplifies the installation process. It eliminates the need for complex chain connections and precise lifting point layout, reducing failures such as detachment or breakage of connectors due to insufficient installation accuracy or lack of maintenance, and improving system reliability.

[0009] As a preferred implementation of an unloading overlap device suitable for secondary conveyor belt transfer machines, the stop structure is a baffle plate. The outer edge of the baffle plate protrudes from the outer circumference of the traveling wheel, and the distance between the opposite sides of the two baffle plates is 1-10mm larger than the width of the scraper conveyor chute. With this structural design, baffle plates are installed on the outer end face of the traveling wheel, and the distance between the two baffle plates is 1-10mm greater than the width of the scraper conveyor chute. This allows the baffle plates to lock onto the edges of the scraper conveyor chute, preventing lateral displacement of the secondary conveyor belt transfer machine due to vibration or coal flow impact during operation. This ensures stable equipment trajectory and avoids material unloading deviations caused by positional offsets. The 1-10mm spacing ensures the limiting effect of the baffle plates while avoiding rigid jamming, allowing the equipment to self-adjust within a certain range, reducing mechanical stress concentration, and extending equipment life.

[0010] As a preferred implementation of an unloading overlap device suitable for a secondary conveyor belt transfer machine, the baffle is a circular plate, coaxially arranged with the traveling wheel, and its outer diameter is larger than that of the traveling wheel. This structural design, with the circular baffle coaxially arranged with the traveling wheel, ensures that the limiting force is evenly distributed around the outer circumference of the traveling wheel, avoiding excessive local stress caused by the irregular shape of the baffle, and improving the stability and durability of the stop structure. The design with an outer diameter larger than the traveling wheel allows the baffle to more reliably contact the edge of the scraper conveyor chute, enhancing the limiting effect while reducing the risk of wear on the edge of the traveling wheel.

[0011] As a preferred implementation of an unloading overlap device suitable for secondary conveyor belt transfer conveyors, the top of the support frame is connected to the frame of the secondary conveyor belt transfer conveyor, the bottom of the support frame is connected to the base, the base is connected to the connecting shaft, and two traveling wheels are rotatably connected to both ends of the connecting shaft. Using this structural scheme, the base serves as an intermediate connecting component, simplifying the assembly process of the support frame and traveling wheels, facilitating rapid on-site installation and disassembly, and improving construction efficiency. The rotatable connection of the traveling wheels at both ends of the connecting shaft allows adjustment of the distance between the two traveling wheels according to the width of the scraper conveyor chute, adapting to different specifications of scraper conveyors and improving the versatility of the device.

[0012] As a preferred implementation of an unloading overlap device for a secondary conveyor belt transfer machine, several bases are provided, arranged along the length of the connecting shaft. With this structural design, the even distribution of multiple bases disperses the weight of the secondary conveyor belt transfer machine to different positions on the connecting shaft, reducing single-point stress, preventing bending deformation of the connecting shaft due to excessive load, improving overall structural strength, and thus ensuring stable operation of the secondary conveyor belt transfer machine.

[0013] As a preferred implementation of an unloading overlap device for a secondary conveyor belt transfer machine, the support frame includes a top plate and a bottom plate arranged in parallel, with two vertical plates connecting the top and bottom plates vertically. Using this structural design, the support frame is a stable rectangular frame structure, effectively resisting the vertical loads and horizontal vibrations during the operation of the secondary conveyor belt transfer machine, preventing the support frame from twisting or breaking due to uneven stress. At the same time, the frame-type support frame is lightweight, easy to manufacture, and has a lower cost.

[0014] As a preferred implementation of the unloading overlap device for a secondary conveyor belt transfer machine, the top plate is connected to the bottom of the machine frame by bolts. This bolted connection facilitates quick on-site installation and disassembly, and also provides a stable preload.

[0015] As a preferred implementation of an unloading overlap device suitable for a secondary conveyor belt transfer conveyor, the unloading overlap device includes an unloading frame connected to the unloading end of the secondary conveyor belt transfer conveyor. The unloading frame includes two parallel side plates, which are respectively connected to both sides of the frame of the secondary conveyor belt transfer conveyor. A connecting rod connects the two side plates, and a downwardly inclined plate is connected to the bottom of each side plate. Using the above structural scheme, the unloading frame can guide the material unloading into the chute of the scraper conveyor through the side plates and inclined plates. Specifically, the two side plates can not only connect to the frame to form rigid support, reducing the shaking of the unloading frame, but also guide the material unloaded from the secondary conveyor belt transfer conveyor into the unloading frame. The downward inclination of the inclined plates can guide the material inside the unloading frame to fall in a preset direction into the central area of ​​the scraper conveyor chute, reducing material splashing and deviation caused by free fall, further reducing the risk of chute blockage and improving transportation efficiency.

[0016] As a preferred implementation of the unloading overlap device for a secondary conveyor belt transfer machine, the two side plates are respectively connected to both sides of the machine frame of the secondary conveyor belt transfer machine by bolts. Using the above structural scheme, the bolt connection facilitates quick on-site installation and disassembly, and also provides a stable preload.

[0017] As a preferred implementation of the unloading overlap device for a secondary conveyor belt transfer machine, the outer circumferential surface of the traveling wheel is provided with anti-slip texture, which is an interlaced grid pattern. Using this structural design, the anti-slip texture increases the contact friction between the traveling wheel and the top of the scraper conveyor chute, preventing slippage of the traveling wheel during coal flow impact or equipment startup or braking, thus ensuring the stable operation of the secondary conveyor belt transfer machine.

[0018] The beneficial effects of this utility model include:

[0019] This application utilizes traveling wheels at the bottom of the support frame to connect with the top of the scraper conveyor chute, allowing the secondary conveyor belt to connect with the scraper conveyor via the rolling of the traveling wheels, without detaching the traveling wheels from the top of the scraper conveyor chute. Compared to existing technologies, this application has three major advantages: First, it eliminates reliance on the roof, fundamentally eliminating the risk of equipment tilting and falling, thus improving system safety. Second, it has strong seismic resistance; the rolling contact of the traveling wheels replaces the rigid suspension in existing technologies, buffering the vibrations caused by the impact of large-flow coal, reducing the swaying of the secondary conveyor belt, and preventing problems such as coal spillage and chute blockage caused by material unloading trajectory deviation, thereby improving transportation efficiency. Third, it has lower installation difficulty; the traveling wheels directly connect to the top of the scraper conveyor chute, simplifying the installation process. It eliminates the need for complex chain connections and precise lifting point layout, reducing malfunctions such as connector detachment and breakage due to insufficient installation accuracy or lack of maintenance, thus improving system reliability. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front structural diagram of an unloading overlap device suitable for a secondary conveyor belt transfer machine according to a specific embodiment of the present utility model.

[0022] Figure 2 This is a side view of an unloading overlap device suitable for a secondary conveyor belt transfer machine according to a specific embodiment of the present invention.

[0023] Figure 3 This is a side view of the unloading frame in a specific embodiment of the present utility model;

[0024] Figure 4 This is a front structural diagram of the traveling wheel and the stop block in a specific embodiment of this utility model.

[0025] List of components and reference numerals:

[0026] 1. Second-stage conveyor belt transfer machine; 11. Frame; 12. Unloading roller; 2. Scraper conveyor; 3. Support frame; 31. Top plate; 32. Bottom plate; 33. Vertical plate; 34. Bolt 1; 4. Traveling wheel; 5. Chute; 6. Baffle; 7. Base; 8. Connecting shaft; 9. Unloading frame; 91. Side plate; 92. Connecting rod; 93. Inclined plate; 94. Bolt 2; 10. Stop block. Detailed Implementation

[0027] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] Reference Figure 1-3 This embodiment proposes an unloading overlap device suitable for a secondary conveyor belt transfer machine, which is installed between the secondary conveyor belt transfer machine 1 and the scraper conveyor 2. The unloading overlap device includes a support frame 3 and an unloading frame 9.

[0029] The support frame 3 includes a top plate 31 and a bottom plate 32 arranged in parallel. Two vertical plates 33 are vertically connected between the top plate 31 and the bottom plate 32. The top plate 31 is connected to the bottom of the frame 11 of the secondary conveyor belt 1 by bolts 34. The bottom plate 32 is connected to the base 7, and the base 7 is connected to the connecting shaft 8. There are several bases 7, which are arranged along the length of the connecting shaft 8. Both ends of the connecting shaft 8 are rotatably connected to a traveling wheel 4 through bearings. The outer circumference of the traveling wheel 4 is provided with anti-slip texture, which is an interlaced grid pattern. The axial direction of each traveling wheel 4 (i.e., the axial direction of the connecting shaft 8) is perpendicular to the transport direction of the secondary conveyor belt 1. Two traveling wheels 4 are located on both sides of the secondary conveyor belt 1. Each traveling wheel 4 is attached to the top of the trough 5 of the scraper conveyor 2, and each traveling wheel 4 can roll along the extension direction of the scraper conveyor 2 trough 5 on the top of the scraper conveyor 2 trough 5.

[0030] The end face of each traveling wheel 4 furthest from the other traveling wheel 4 is the outer end face of that traveling wheel 4. Each outer end face of the traveling wheel 4 is connected to a stop structure. The outer edge of the stop structure protrudes from the outer circumferential surface of the traveling wheel 4. The stop structure prevents the traveling wheel 4 from detaching from the top of the trough 5 of the scraper conveyor 2. In this embodiment, the stop structure is a baffle 6, which is a circular plate. The baffle 6 is coaxially arranged with the traveling wheel 4, and its outer edge protrudes from the outer circumferential surface of the traveling wheel 4. That is, the outer diameter of the baffle 6 is larger than the outer diameter of the traveling wheel 4. The distance between the opposite sides of the two baffles 6 is 1mm-10mm larger than the width of the trough 5 of the scraper conveyor 2. (Refer to...) Figure 4 The stop structure can also be a number of stops 10 evenly arranged along the circumferential direction of the traveling wheel 4. The outer edge of the stops 10 protrudes from the outer circumferential surface of the traveling wheel 4, and the inner side of the stops 10 and the outer edge of the trough 5 of the scraper conveyor 2 are provided with a moving gap.

[0031] The unloading frame 9 is connected to the unloading end of the secondary conveyor belt transfer machine 1. The unloading frame 9 includes two parallel side plates 91. The two side plates 91 are respectively connected to the two sides of the frame 11 of the secondary conveyor belt transfer machine 1 by bolts 94. A connecting rod 92 is connected between the two side plates 91. The bottom of the two side plates 91 is connected to a downwardly inclined plate 93.

[0032] Work process:

[0033] First, connect the support frame 3, base 7, and connecting shaft 8 together. Then, determine the spacing between the two traveling wheels 4 according to the width of the chute 5 of the scraper conveyor 2, ensuring that each traveling wheel 4 can overlap the top of the chute 5 of the scraper conveyor 2. The distance between the opposite sides of the two baffles 6 should be 1mm-10mm larger than the width of the chute 5 of the scraper conveyor 2, ensuring that while the traveling wheels 4 can roll on the chute 5, the baffles 6 always hold the outer edge of the chute 5 of the scraper conveyor 2. Connect the top plate 31 of the support frame 3 to the bottom of the frame 11 of the secondary conveyor belt transfer machine 1 using bolt 1 34. Connect the two side plates 91 of the unloading frame 9 to the two sides of the frame 11 of the secondary conveyor belt transfer machine 1 using bolt 2 94, completing the installation.

[0034] When the secondary conveyor belt transfer machine 1 is running, the belt on the secondary conveyor belt transfer machine 1 transports the coal, gangue and other materials cut off by the tunneling machine from the end of the primary conveyor of the tunneling machine to the unloading roller 12 at the unloading end of the secondary conveyor belt transfer machine 1. After passing through the unloading roller 12, the material falls into the unloading frame and is accurately dropped into the chute 5 of the scraper conveyor 2 under the guidance of the side plate 91 and the inclined plate 93.

[0035] When the secondary conveyor belt 1 moves with the tunneling machine, the traveling wheels 4 roll on top of the trough 5 of the scraper conveyor 2. Due to the presence of the baffle 6, the secondary conveyor belt 1 will not deviate from the scraper conveyor 2 during movement, always maintaining an accurate overlap position, ensuring that materials can always be unloaded into the scraper conveyor 2 trough 5, adapting to the complex and ever-changing underground working environment. When the secondary conveyor belt 1 is not working, this application can also fix the tail of the secondary conveyor belt 1, preventing the tail of the secondary conveyor belt from swinging left and right.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An unloading overlap device suitable for a secondary conveyor belt transfer machine, which is disposed between the secondary conveyor belt transfer machine (1) and the scraper conveyor (2), characterized in that, The unloading and overlapping device includes a support frame (3), which is set at the bottom of the frame (11) of the secondary conveyor belt transfer machine (1). Two traveling wheels (4) are rotatably provided at the bottom of the support frame (3). The two traveling wheels (4) are located on both sides of the secondary conveyor belt transfer machine (1). The axial direction of each traveling wheel (4) is perpendicular to the transport direction of the secondary conveyor belt transfer machine (1). Each traveling wheel (4) overlaps with the top of the trough (5) of the scraper conveyor (2). A stop structure is connected to the outer end face of each traveling wheel (4). The outer edge of the stop structure protrudes from the outer circumference of the traveling wheel (4). The stop structure can prevent the traveling wheel (4) from detaching from the top of the trough (5) of the scraper conveyor (2).

2. The unloading overlap device for a secondary conveyor belt transfer machine according to claim 1, characterized in that, The stop structure is a baffle (6), the outer edge of the baffle (6) protrudes from the outer circumference of the traveling wheel (4), and the distance between the opposite sides of the two baffles (6) is 1-10mm larger than the width of the trough (5) of the scraper machine (2).

3. The unloading overlap device for a secondary conveyor belt transfer machine according to claim 2, characterized in that, The baffle (6) is a circular plate. The baffle (6) is coaxially arranged with the walking wheel (4). The outer diameter of the baffle (6) is larger than the outer diameter of the walking wheel (4).

4. The unloading overlap device suitable for a secondary conveyor belt transfer machine according to claim 1, characterized in that, The top of the support frame (3) is connected to the frame (11) of the secondary conveyor belt transfer machine (1), the bottom of the support frame (3) is connected to the base (7), the base (7) is connected to the connecting shaft (8), and the two traveling wheels (4) are respectively rotatably connected to the two ends of the connecting shaft (8).

5. The unloading overlap device suitable for a secondary conveyor belt transfer machine according to claim 4, characterized in that, There are several bases (7), and the several bases (7) are arranged along the length direction of the connecting shaft (8).

6. The unloading overlap device suitable for a secondary conveyor belt transfer machine according to claim 1, characterized in that, The support frame (3) includes a top plate (31) and a bottom plate (32) arranged in parallel, and two vertical plates (33) are vertically connected between the top plate (31) and the bottom plate (32).

7. The unloading overlap device for a secondary conveyor belt transfer machine according to claim 6, characterized in that, The top plate (31) is connected to the bottom of the frame (11) of the second conveyor belt transfer machine (1) by bolt (34).

8. The unloading overlap device for a secondary conveyor belt transfer machine according to claim 1, characterized in that, The unloading overlap device includes an unloading frame (9), which is connected to the unloading end of the secondary conveyor belt transfer machine (1). The unloading frame (9) includes two parallel side plates (91), which are respectively connected to the two sides of the frame (11) of the secondary conveyor belt transfer machine (1). A connecting rod (92) is connected between the two side plates (91), and a downwardly inclined plate (93) is connected to the bottom of each side plate (91).

9. The unloading overlap device for a secondary conveyor belt transfer machine according to claim 8, characterized in that, The two side plates (91) are respectively connected to the two sides of the frame (11) of the second conveyor belt transfer machine (1) by bolts (94).

10. The unloading overlap device for a secondary conveyor belt transfer machine according to claim 1, characterized in that, The outer circumference of the walking wheel (4) is provided with anti-slip texture, which is an interlaced grid pattern.

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